1 #ifndef _H8300_BITOPS_H
2 #define _H8300_BITOPS_H
3
4 /*
5 * Copyright 1992, Linus Torvalds.
6 * Copyright 2002, Yoshinori Sato
7 */
8
9 #include <linux/compiler.h>
10
11 #ifdef __KERNEL__
12
13 #ifndef _LINUX_BITOPS_H
14 #error only <linux/bitops.h> can be included directly
15 #endif
16
17 /*
18 * Function prototypes to keep gcc -Wall happy
19 */
20
21 /*
22 * ffz = Find First Zero in word. Undefined if no zero exists,
23 * so code should check against ~0UL first..
24 */
ffz(unsigned long word)25 static inline unsigned long ffz(unsigned long word)
26 {
27 unsigned long result;
28
29 result = -1;
30 __asm__("1:\n\t"
31 "shlr.l %2\n\t"
32 "adds #1,%0\n\t"
33 "bcs 1b"
34 : "=r"(result)
35 : "0"(result), "r"(word));
36 return result;
37 }
38
39 #define H8300_GEN_BITOP(FNAME, OP) \
40 static inline void FNAME(int nr, volatile unsigned long *addr) \
41 { \
42 unsigned char *b_addr; \
43 unsigned char bit = nr & 7; \
44 \
45 b_addr = (unsigned char *)addr + ((nr >> 3) ^ 3); \
46 if (__builtin_constant_p(nr)) { \
47 __asm__(OP " %1,%0" : "+WU"(*b_addr) : "i"(nr & 7)); \
48 } else { \
49 __asm__(OP " %s1,%0" : "+WU"(*b_addr) : "r"(bit)); \
50 } \
51 }
52
53 /*
54 * clear_bit() doesn't provide any barrier for the compiler.
55 */
56 #define smp_mb__before_clear_bit() barrier()
57 #define smp_mb__after_clear_bit() barrier()
58
59 H8300_GEN_BITOP(set_bit, "bset")
60 H8300_GEN_BITOP(clear_bit, "bclr")
61 H8300_GEN_BITOP(change_bit, "bnot")
62 #define __set_bit(nr, addr) set_bit((nr), (addr))
63 #define __clear_bit(nr, addr) clear_bit((nr), (addr))
64 #define __change_bit(nr, addr) change_bit((nr), (addr))
65
66 #undef H8300_GEN_BITOP
67
test_bit(int nr,const unsigned long * addr)68 static inline int test_bit(int nr, const unsigned long *addr)
69 {
70 int ret = 0;
71 unsigned char *b_addr;
72 unsigned char bit = nr & 7;
73
74 b_addr = (unsigned char *)addr + ((nr >> 3) ^ 3);
75 if (__builtin_constant_p(nr)) {
76 __asm__("bld %Z2,%1\n\t"
77 "rotxl %0\n\t"
78 : "=r"(ret)
79 : "WU"(*b_addr), "i"(nr & 7), "0"(ret) : "cc");
80 } else {
81 __asm__("btst %w2,%1\n\t"
82 "beq 1f\n\t"
83 "inc.l #1,%0\n"
84 "1:"
85 : "=r"(ret)
86 : "WU"(*b_addr), "r"(bit), "0"(ret) : "cc");
87 }
88 return ret;
89 }
90
91 #define __test_bit(nr, addr) test_bit(nr, addr)
92
93 #define H8300_GEN_TEST_BITOP(FNNAME, OP) \
94 static inline int FNNAME(int nr, void *addr) \
95 { \
96 int retval = 0; \
97 char ccrsave; \
98 unsigned char *b_addr; \
99 unsigned char bit = nr & 7; \
100 \
101 b_addr = (unsigned char *)addr + ((nr >> 3) ^ 3); \
102 if (__builtin_constant_p(nr)) { \
103 __asm__("stc ccr,%s2\n\t" \
104 "orc #0x80,ccr\n\t" \
105 "bld %4,%1\n\t" \
106 OP " %4,%1\n\t" \
107 "rotxl.l %0\n\t" \
108 "ldc %s2,ccr" \
109 : "=r"(retval), "+WU" (*b_addr), "=&r"(ccrsave) \
110 : "0"(retval), "i"(nr & 7) : "cc"); \
111 } else { \
112 __asm__("stc ccr,%t3\n\t" \
113 "orc #0x80,ccr\n\t" \
114 "btst %s3,%1\n\t" \
115 OP " %s3,%1\n\t" \
116 "beq 1f\n\t" \
117 "inc.l #1,%0\n\t" \
118 "1:\n" \
119 "ldc %t3,ccr" \
120 : "=r"(retval), "+WU" (*b_addr) \
121 : "0" (retval), "r"(bit) : "cc"); \
122 } \
123 return retval; \
124 } \
125 \
126 static inline int __ ## FNNAME(int nr, void *addr) \
127 { \
128 int retval = 0; \
129 unsigned char *b_addr; \
130 unsigned char bit = nr & 7; \
131 \
132 b_addr = (unsigned char *)addr + ((nr >> 3) ^ 3); \
133 if (__builtin_constant_p(nr)) { \
134 __asm__("bld %3,%1\n\t" \
135 OP " %3,%1\n\t" \
136 "rotxl.l %0\n\t" \
137 : "=r"(retval), "+WU"(*b_addr) \
138 : "0" (retval), "i"(nr & 7)); \
139 } else { \
140 __asm__("btst %s3,%1\n\t" \
141 OP " %s3,%1\n\t" \
142 "beq 1f\n\t" \
143 "inc.l #1,%0\n\t" \
144 "1:" \
145 : "=r"(retval), "+WU"(*b_addr) \
146 : "0" (retval), "r"(bit)); \
147 } \
148 return retval; \
149 }
150
151 H8300_GEN_TEST_BITOP(test_and_set_bit, "bset")
152 H8300_GEN_TEST_BITOP(test_and_clear_bit, "bclr")
153 H8300_GEN_TEST_BITOP(test_and_change_bit, "bnot")
154 #undef H8300_GEN_TEST_BITOP
155
156 #include <asm-generic/bitops/ffs.h>
157
__ffs(unsigned long word)158 static inline unsigned long __ffs(unsigned long word)
159 {
160 unsigned long result;
161
162 result = -1;
163 __asm__("1:\n\t"
164 "shlr.l %2\n\t"
165 "adds #1,%0\n\t"
166 "bcc 1b"
167 : "=r" (result)
168 : "0"(result), "r"(word));
169 return result;
170 }
171
172 #include <asm-generic/bitops/find.h>
173 #include <asm-generic/bitops/sched.h>
174 #include <asm-generic/bitops/hweight.h>
175 #include <asm-generic/bitops/lock.h>
176 #include <asm-generic/bitops/le.h>
177 #include <asm-generic/bitops/ext2-atomic.h>
178
179 #endif /* __KERNEL__ */
180
181 #include <asm-generic/bitops/fls.h>
182 #include <asm-generic/bitops/__fls.h>
183 #include <asm-generic/bitops/fls64.h>
184
185 #endif /* _H8300_BITOPS_H */
186